Identification, Authentication, Security ICs

AT88SCxxxxCA is a family of four high-performance secure memory devices providing 1K to 8K bits of user memory with advanced built-in security and cryptographic features. The memory is divided into four or eight user zones each of which may be individually set with different security access rights or used together to provide space for one or multiple data files. A configuration zone contains registers to define the security rights for each user zone and space for passwords and secret keys used by the security logic of Crypto Memory . Through dynamic, symmetric-mutual authentication, data encryption, and the use of encrypted checksums, Crypto Memory provides a secure place for storage of sensitive information within a system. With its tamper protection circuits, this information remains safe even under attack. Crypto Memory also provides high security, low cost and ease of implementation of host-client type systems without the need for a microprocessor operating system. The embedded cryptographic engine provides for a dynamic, symmetric-mutual authentication between the device and host, as well as performs stream encryption for all data and passwords exchanged between the device and host. Up to four unique key sets may be used for these operations.

• One of a family of devices with user memories from 1Kbit to 8Kbit
• EEPROM user memory
  • Four or eight zones
  • Self-timed write cycles
  • Single-byte or multiple-byte page-write modes
  • Programmable access rights for each zone
• 2Kbit configuration zone
  • 37-byte OTP area for user-defined codes
  • 160-byte area for user-defined keys and passwords
• High security features
  • 64-bit mutual authentication protocol (under license of ELVA)
  • Cryptographic Message Authentication Codes (MAC)
  • Stream encryption
  • Four key sets for authentication and encryption
  • Eight sets of two 24-bit passwords
  • Anti-tearing function
  • Voltage and frequency monitor
• Embedded application features
  • Low voltage supply: 2.7V to 3.6V
  • Secure nonvolatile storage for sensitive system or user information
  • Two-wire serial interface (TWI, 5V compatible)
  • 1.0MHz compatibility for fast operation
  • Standard 8-lead plastic packages, green compliant (exceeds RoHS)
  • Same pinout as two-wire Serial EEPROMs
• Smart card features
  • ISO 7816 Class B (3V) operation
  • ISO 7816-3 asynchronous T = 0 protocol (Gem plus® patent)
  • Multiple zones, key sets and passwords for multi-application use
  • Synchronous two-wire serial interface for faster device initialization
  • Programmable 8-byte Answer-To-Reset (ATR) register
  • ISO 7816-2 compliant moduls
• High Reliability
  • Endurance: 100,000 cycles
  • Data retention: 10 years
  • ESD protection: 2,000V